Roller removing tool



Feb 1952 A. GLOVER 2,587,139

ROLLER REMOVING TOOL Filed Jan. 26, 1949 Inventor Attorney Patented Feb. 26, 1952 UNITED STATES PATENT OFFICE ROLLER REMOVING TOOL Abram Glover, Rifle, Colo.

Application January 26, 1949, Serial No. 72,930

2 Claims.

This invention relates to a unique tool of extremely simple construction for use particularly by watchmakers in the moving rollers from the staffs of balance wheels and which operation is otherwise quite difficult to accomplish without injuring or-damaging the staff or balance wheel due to the relatively small size of the parts and the tendency of rollers, which have not been removed for a considerable period of time, to stick or frictionally engage the staffs.

Stilla further object of the invention is to provide a tool for the aforedescribed purpose of extremely simple construction which constitutes a unitary structure and which may be efiiciently employed for removing rollers from balance staffs without subjecting the staff to an impact blow.

Still a further object of the invention is to provide a tool which may be economically manufactured and sold and which will be efficient and durable for accomplishing its intended purpose.

Various other objects and advantages of the invention will hereinafter become more fully apparent from the following description of the drawing, illustrating a presently preferred emcated by the lines 3-3 and 4-4, respectively, of

Figure 1.

Referring more specifically to the drawing, the roller removing tool in its entirety and which comprises the invention is designated generally 5 and includes a head 6 formed of spaced substantially parallel plates 1 and 8 of substantially uniform size and shape, the upper plate 1 of which is broken away in Figure 1 to illustrate internal details of the tool 5, as will hereinafter become apparent.

The tool 5 also includes a pair of elongated levers 9 and In which are tapered in width substantially from end-to-end thereof and the enlarged ends of which are disposed between the plates 1 and 8 forming the head 6. The enlarged end of the lever 9 is rigidly secured in the head 6 by a plurality of rivets or other fastenings H which extend therethrough and through the plates I and 8 and by which said plates are connected to form the head 6. The enlarged end of the other lever i9 is disposed in the head 6 and swingably connected thereto by a single rivet or pivot pin [2 which extends loosely therethrough and through the plates 1 and 8 so that the lever 59 may swing toward and away from the lever 9 in a plane corresponding to the plane of said levers.

A spring 13 comprising a resilient strand of relatively heavy gauge wire the resiliency of which causes said strand to normally assume a straight position, has one end thereof slidably secured in the head 9 between a screw M which extends detachably and threadedly through portions of the plates 1 and 8; and a screw l5 which is disposed substantially parallel to said end of the spring l3 and which is disposed between said plates 1 and 8 anda portion of the enlarged end of the lever 9 and said end of the spring [3. The portions of the plates 1 and 8 and lever 9 which are engaged by the screw l5 may be threaded for detachably mounting said screw therein, and sufficient space is afforded between the screws i4 and id to enable said aforementioned end of the spring l3 to slide relatively thereto, for a purpose which will hereinafter become apparent. The spring l3 extends from the screws l4 and I5 through the head 8 in a direction transversely of the longitudinal axis of the tool 5 and is tensioned to curve around the arcuate, convex inner end l6 of the lever l0 and has its opposite end projecting from the head 6 along the outer longitudinal edge of the lever to. Said last mentioned, exposed end of the spring l3 slidably engages in a loop H which is connected to the lever l9, adjacent the head 6 and which projects laterally from the outer lon itudinal edge thereof. The tendency of the spring l3 to assume a straight position will cause the last mentioned end thereof to exert a pull on the link I! to cause the lever Hi to swing on its pivot I 2 and relatively to the head 6 in a direction away from the lever 9 and so that said levers 9 and It] will be normally disposed in outwardly diverging relationship from the head 6 rather than in nearly parallel relationship, as seen in Figure 1. The rounded inner end l6 of the lever. H3 is eccentric with respect to the pivot l2 so that a portion thereof will engage the adjacent edge of the enlarged inner end of the lever 9 for limiting the swinging movement of the lever Ill away from the lever 9 under the biasing action of the spring IS.

The upper surfaces of the levers 9 and In from a line disposed in transverse alignment with the inner end of the head 6, are beveled on their upper sides from adjacent their outer or remote longitudinal edges to their inner, adjacent longitudinal edges as clearly illustrated in Figures 3 and 4 at [8 and 19, respectively. Said beveled upper surfaces l8 and IQ of the levers 9 and I!) provide substantially sharpened or feathered inner edges 20 and 2! of the levers 9 and In, respectively, adjacent the head 6. The bevel of the upper surfaces l8 and I9 diminishes from the head toward the outer ends of said levers and ceases at points spaced from said outer ends and accordingly the thickness of the inner, tapered edges 20 and 2| increases in a direction away from the head 6. As clearly illustrated in Figures 3 and 4, the opposite, bottom sides of the levers 9 and N! are substantially flat and disposed in the same plane.

To utilize the tool for removing'a roller 22 from the staff 23 of a balance wheel 24, said tool is initially inverted from its position of Figure 1 so that the beveled surfaces l8 and [9 will be facing downwardly. The stafi 23and roller .22 :arethen inserted downwardly through the space between the lever edges 28 and 2! andso that the balance wheel 24 will rest on the fiat, normally bottom surfaces of the levers 9 and id and so that the roller table 25 will bear against portions of the beveled surfaces 18 and IS. The balance wheel 24 and attached parts are then movedto a position adjacent the head 8 after which the tool is inverted so that the beveled surfaceslil and {9 will be uppermost. With one hand grasping the tool adjacent the free end of thelevers's and it, the index finger of the other hand is positioned under the balance wheel and the thumb over the roller table to guard against loss of the roller when removed. The wheel and roller are then moved away from the head 6 until the edges and 2| bind between the roller table and the arm of the balance wheel, if necessary the levers 9 and it) being moved slightly toward one another to prevent the rollertable from moving out of engagement with the beveled surfaces '8 and iii. With the balance wheel and roller able thus positioned, pressure is exerted against he lever it toward the lever B to cause the roller le'25 to'ride laterally upwardly on the beveled surfaces l8 and Id which thus functionas cams for forcing theroller and roller table away from the balance wheel. If this is insuficient to loosen the roller so that it can be readily removed with the fingers from the staff 23, pressure on the levers and ill are released and the balance wheel free ends of the levers 9 and id for swinging invention as hereinafter defined by the appended claims.

I claim as my invention:

1. A roller removing tool comprising a head, a lever fixedly secured at one end thereof to the head and projecting therefrom, a second, movable lever having one end pivotally connected to the head and extending therefrom, said movable lever being mounted to swing in a plane corresponding to the plane of each of said levers, spring means for yieldably urging the free end of the movable lever away from the fixed lever,

said levers having complimentary sides beveled from the outer edges to the inner edges of the levers adjacent the head and defining complimentary beveled surfaces, the slope of said beveled surfaces diminishing toward the free ends of the levers, said beveled surfaces providing relatively thin adjacent lever edges near the head which increase in thickness in direction away fromthe head, said levers being adapted to have a balance wheel stafi and roller extending between their adjacent edges and with a balance wheel of the staff bearing against the opposite sides of the levers and the table of the roller bearing against the beveled surfaces thereof, said balance wheel and roller being movable longitudinally of the levers for wedging the adjacent lever edges between the balance wheel and roller table, and said movable lever being swingable toward the stationary lever to cause the roller table to ride outwardly on said'beveled surfaces for displacing it on the staff away from the balance wheel.

2. A balance wheel roller removing tool comprising a head, a pair of levers connected to and projecting from said head in the same direction, one of said levers being rigidly secured to the head and the otheriof said levers being pivotally connected thereto for swinging movement toward and away from the rigid lever in a plane corresponding to the planes of the levers, said levers having outer longitudinal edges of uniform thickness from end-to-end thereof, the portions of said levers adjacent the head being beveled on corresponding sides thereof from their outer to their inner longitudinal edges to provide complementary thin inner, adjacent edges near the head, and the slope of said beveled sides diminishing from thehead toward the free ends of the levers whereby the thickness of the inner edgesof said levers is increased in a direction away from the head.

ABRAM GLOVER.

REFERENCES ClTED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 404,937 Thompson June 11, 1889 533,923 Seyfriedt Feb. 12, 1895 1,674,644 Helfgott June 26, 1928 2,215,122 Hess Sept. 17, 1940 

